5.8.3 For systems without thermal storage
The use of thermal storage is highly recommended, but with its active cleaning
design, fast ignition properties, temperature control capibilities, and other automation,
the P4 Pellet boiler excels compared to all other pellet boilers with or without thermal
storage.
Constant circulation
When no thermal storage is utilized, the P4 Pellet boiler’s circulator is always on at a
fixed speed when the boiler is operating. It is crucial to have the proper flow rate
through the boiler. Overly high flow rates will reduce output temperatures and low
flow rates may cause the boiler to overheat. All systems without thermal storage must
have a balancing valve installed to properly set the flow rate using the cart below:
Adjusting flow rates
A balancing valve with built-in flow meter like the one
pictured enables precise and simple adjustment. The
volume flow rate is measured in gpm, so there is no need
to spend time determining settings using diagrams or
other aids. The volume flow rate value can be set using
the scale of the meter integrated into the bypass if the
handle is pressed. If the systems are not balanced
correctly, there is the possibility of excessive high flow
volume through the boiler, which results in a relatively
low temperature difference between the boiler flow
return.
Hydraulic separators
Some systems will require the use of a hydraulic seperator to isolate the flow of the
boiler system from the rest of the heating system to allow the ability to have constant
circulation through the P4 Pellet boiler. Use the chart below for proper sizing.
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